fix: CCTV agent text-based fallback when no Gemini key / no frames

feat: complete all dashboard pages + real multi-agent SSE pipeline

Update config.ts: user-configurable base URLs, models, and LLM provider override

Add example.env with all configurable options

v2.0: production multi-agent-system/README.md

v2.0: production multi-agent-system/index.ts

v2.0: production multi-agent-system/orchestrator.ts

v2.0: production multi-agent-system/agents-secondary.ts

v2.0: production multi-agent-system/agents-primary.ts

v2.0: production multi-agent-system/api-clients.ts

v2.0: production multi-agent-system/config.ts

Add multi-agent-system/orchestrator.ts

Add multi-agent-system/index.ts

Add multi-agent-system/config.ts

Add multi-agent-system/api-clients.ts

Add multi-agent-system/agent-toxicology.ts

Add multi-agent-system/agent-timeline.ts

Add multi-agent-system/agent-risk.ts

Add multi-agent-system/agent-explainability.ts

Add multi-agent-system/agent-correlation.ts

Add multi-agent-system/agent-cctv.ts

Add multi-agent-system/agent-autopsy.ts

Add multi-agent-system/README.md